Automatic reversible hoist



March 30,1926. I 1,573,9 5 l r "1% wyf March 30, 1926. 1,578,965

\ H. J. ECK I AUTOMATIC REVERSIBLE HOIST Filed Deo..5, 1 2 3 Sheets-Sheet 2 March 30 1926.

H. .1. ECK

AUTOMATIC REVERSIBLE HOIST 3 sneaks-sheet :s

Filed Dec. 5, 1924 Patented Mar. 30,1926.

I provement UNITED STATES PATENT OFFICE.

HENRY J. ECK, OF CHICAGO, ILLINOIS, ASSIGNOR TO ROBERTS & SCHAEFER COMPANY,

OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

AUTOMATIC REVERSIBLE HOIST.

Application filed December 3, 1924. Serial No. 753,583

To all it may concern:

Be it known that I, HENRY J EoK, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Imin an Automatic Reversible Hoist, of whichthe following is a specification.

My invention relates to a hoist, and particularly to a hoist adapted for use in coaling stations, although it may be used for other purposes. One object of my invention is to provide a particularly compact and efli cient hoisting mechanism. Another object is to provide a hoisting drum in which the gearing or driving mechanism is enclosed within the drum. Another object is to provide a compact driving connection within an oil contain ng closure. Another object is to provide a hoisting drum which shall be selflocking, when the drive is discontinued.

Other objects will appear from time to time in the course of the specification and claims.

I illustrate m invention more or less diagrammatically 1n the accompanying draw ings wherein:

Figure 1 is a vertical, axial section;

Figure 2 is a section on the line, 2--2 of Figure 1; and V Figure 3 is a section on the line 3-3 of Figure 1.

Like parts are illustrated by like symbols throughout the specification and drawings.

A is any suitable supporting surface on which are mounted the upwardly projecting iers A upon which the hoist is mounted.

Bare brackets supported on and permanentlysecured to the piers in any suitable manner.

O is any suitable motor means, herein shown as an electric motor. Its shaft O is secured by means of the flexible coupling O to the drive shaft D which is thereby rotated by the motor at the same rate of revolution as the motor.

EE are supporting sleeves mounted in said rackets B and having at their inner ends t e generally circular radial webs E E E is a spacing and supporting element bearings D D D mounted within the elements EE w 1 On the shaft D is a pinion F which meshes with three equal sized pinions- F each of which rotates about a pin F supported in a radial projection F from the member E These 'pinions mesh with the internally toothed ring gear G which is connected by the web. Or to the hub G which rotates about the shaft D. Keyed to or integral with the hub Gr is the pinion Gr which is in mesh. with three pinions H keyed to the three shafts H which rotate in the bearings H supported in the webs E E and the spacing element E above'mentioned, Each such 'shaft H has mounted thereon an ec-.

centric H which rotates within a corresponding aperture J in the large gear J As the large spur gear J, by its eccentric motion revolves, it climbs around the inside of the internal ring gear K. The gear K is bolted, for example, by the bolts K which pass through the flanges K to'the hoisting drum L.

'The drum L rotates about the sleeves Eli and is supported thereupon by means of the webs LL through which the bolts K also pass. The webs LL terminate on the hearing hubs L L which are in bearing engagement with the bushings L L about the sleeves EFF. L is an oil inlet provided with any suitable closure and L" is an oil outlet,provided with any suitable closure it being understood that the webs LL enclose the entire working mechanism in a substantially oil tight housing.

On one of said hubs L? is mounted a gear M in mesh with a pinion M which controls ashaft M which actuates the switch mecha nism diagrammatically illustrated at M, the

details of which form no part of the present tation of predetermined length in the opposite direction.

It will be'understood that while I have illustrated an operative device,- nevertheless many changes may be made-in thesize, numrest the switchreleases the motor for a rol her, shape and disposition of parts without departing from the spirit of my invention, and that I wish my description and drawings to be taken as in a broad sense illustrative rather than as limiting me to the specific: mechanism described and shown.

The use and operation of my invention are as follows: P

I provide a hoist which is, in the first place, self-locking The eccentric gyrating, gear J travels aboutthe gear K, as it is gyrated by the eccentric members controlled by the gears II, and gives to the gear K apositive rotation. The rotation of the shaft D, in response to rotation of the motor, drives the ring gear K and the drum L through a double reduction, through the pinion F, the pinions F the ring gear G, the pinion G the pinions H, the eccentrics IF, the gear J and the internal ring gear K. When the motor is at rest the drum L cannot rotate, regardless what the tension on the hoist cable'may e. Assuming that the motor is at rest and that the weight on the cable tends to rotate the gear K, as shown in Figure 3, in counter-clockwise direction, the gear K, through its gear teeth, tends to pull the eccentric gear J? inthe same ,di rection; However this pull tends to. rotate the eccentric gear about the uppermost shaft H in the same direction as the pull of the cable, thus tending to lift up the right side of the, eccentric gear, as shown in Figure 3. This pull immediately locks the gear K, since the eccentric gear J cannot be lifted being held against such movement by the order to use my hoist for intermittent and switch breaks the circuit which actuates the motor, and any suitable means may be provided to actuate the switch, and to restart the motor after a predetermined pause.

Setting up my hoist is a, process of peculiar simplicity, since no bearings. are to be aligned, all bearings being supported in or on a single fixed supporting elementcomprising the members EE which are bolted together in permanent relationship.- Thus the bearings are all trued up at the factory as the inevitable result of the correct as sembling of correctly formed castings and correctly proportioned bearing bushings. The necessity of a meticulous alignment of (0 motor and hoist is to a great extent obviated by the use of a flexible driving connection. I assemble my hoist with all the driving connection housed within the drum itself. My hoist therefore occupies a small floor space, and requires small foundation. It is compact, and easy and safe to operate. There are no exposed gears and bearings and the entire driving connection maybe kept in a bath of oil, the drum forming an'oiltight housing.

Iclaim: l c

1.111 a hoist, a drum,- a fixed bearing sleeve Pabout which said drum rotates, a drive shaft penetrating said bearing sleeve, and means for rotating it, and a driving connection between said drive shaft and said drum, and comprising a gear on said drive otary'bearing relation with said eccentrics,

an internal rlng gear surrounding said gyrating gear and in mesh with 115 and of greater diameter than said gear, said ring gear being connected to the drum.

2. In a hoist, acdrum, afixed bearing sleeve about which said drum rotates, a drive shaft penetrating said bearing sleeve, and means for rotating it, and a driving connection between said drive shaft and said drum, and comprising a gear on said drive shaft, a plurality of pinions in mesh therewith, a ring gear surrounding and in mesh with said pinions, a gear of substantially smaller diameter than said ring gear connected. thereto, a plurality of pinions 1n mesh therewith, eccentrics associatedcwith each of said pinions, a gyrating gear having rotary bearing relation with said eccentrics, an internal ring gear surrounding said gyrating gear and in mesh with it and of greater diameter than said gear, said ring gear being connected to the drum, said driv- 1 ing connection being housed within said drum.

3. In a hoist, a drum, afixed bearing sleeve about which said drum rotates, a drive shaft penetrating'sa-id' bearing sleeve, and means for rotating it, and a driving connection between said drive shaft and said drum, comprising a'gear on said drive shaft, an internal ring gear on said drum and a plurality of intermediate-g'ears, a plurality of supporting webs for said intermediate gears outwardly projecting from said bearing sleeve, min-+1 termediate spacing and supporting element, connecting means passing through said outwardly projecting webs and said intermediate spacing element, end members for said drum rotatable about the outer surface of said fixed bearing sleeve, a drum rim member, and a plurality of transverse securin members passing therethrough and adapte to secure the drum rim and end members together. I

4. In a hoist, fixed bearing andsupporting members, a composite bearing sleeve mounted therein, said sleeve comprislng a pair of axially aligned apertured cylindrical members, a drive shaft penetrating said members, a hollow drum rotatable about the cylindrical exterior of said members, a driving connection between said drive shaft and said drum, including a gear on said drive shaft, an internal ring gear on said drum, and a plurality of intermediate gears, supporting and bearing webs for said gears, outwardly projecting from said bearing sleeve members, an intermediate spacing and supporting element positioned webs, and transverse connecting members passing through said webs and said intermediate member and securing the bearing sleeve members together as a unit, said supporting and bearing webs and driving conbetween said nection being entirely enclosed within the drum.

5. In a hoist, fixed bearing and sup orting members, a composite bearings eeve mounted therein, said sleeve comprisin a pair of axially aligned apertured cylindrical members, a drive shaft penetrating said members, a hollow drum rotatable about the cylindrical exterior of said members, a driving connection between said drive shaft and said drum, including a gear on said drive shaft, an internal ring gear on said drum, a plurality of intermediate gears, supporting and bearing .webs for said gears, outwardly projecting from saidbearing sleeve members, an intermediate s acing and supporting element positione between said webs, transverse connecting members passing through said webs and said intermediate member and securing the bearing sleeve members together as a unit, said supporting and bearing webs and driving connection being entirely enclosed within the drum, said drum forming a substantial oil tight casing having oil inlet and outlet apertures and closing means therefor.

Signed at Chicago, county of Cook and State of Illinois, this 1st day of December- HENRY J. ECK. 

